Pen light



FIG. 1 is a front perspective view of the design;

FIG. 2 is a rear perspective view of the design;

FIG. 3 is a front view of the design;

FIG. 4 is a rear view of the design;

FIG. 5 is a side view of the design;

FIG. 6 is a side view of the design;

FIG. 7 is a top view of the design; and,

FIG. 8 is a bottom view of the design.

The broken lines show portions of the article which form no part of the claimed design. 

CLAIM The ornamental design for a pen light, as shown and described. 